/*

state.mjs - <short description TODO>

Copyright (C) 2022 Strudel contributors - see <https://codeberg.org/uzu/strudel/src/branch/main/packages/core/state.mjs>

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/

export class State {

  constructor(span, controls = {}) {

    this.span = span;

    this.controls = controls;

  }

  // Returns new State with different span

  setSpan(span) {

    return new State(span, this.controls);

  }

  withSpan(func) {

    return this.setSpan(func(this.span));

  }

  // Returns new State with added controls.

  setControls(controls) {

    return new State(this.span, { ...this.controls, ...controls });

  }

}

export default State;